Apparatus for reinforcing and punching sheets



B. HIRSON Sept. 28, 1954 APPARATUS FOR REINFORCING AND PUNCHING SHEETS Filed May 2l, 1952 Tram/EY derstood that various changes portion, size and minor details of the structure Patented Sept. 28, 1954 APPARATUS FDR REINFORCING AND PUNCHING SHEETS Beniamin Hirson,

Strongleaf Paper Yonkers, N. Y., lassignor to Corporation, Yonkers, N. Y., a

corporation of New York Application May 21, 1952, Serial No. 289,109

2 Claims.

The invention relates to improvements in apparatus for reinforcing and punching sheets, and is more particularly concerned with an assembly of novelly constructed patch cutting, attaching and punching tools.

The present invention is constructed for use in the shearing of a patch, preferably circular in outline, out of a strip of sheet material such as,

l for example, pressure-sensitive adhesive tape,

and for attaching the sheared patch firmly to a sheet and then punching a hole through the attached patch and sheets. Sheets having patches of this character attached thereto are thus reinforced in the area surrounding the hole usually provided to receive a ring or post-binder. There have been various types of mechanisms devised to attain this result, but, until the development of the present invention, no fully automatic foolproof easily operated apparatus has been obtainable. A related apparatus is disclosed in Hirszson et al., Patent No. 2,583,944, granted January 29, 1952, but the patch shearing, attaching and punching mechanism, therein disclosed, is actuated by manipulation of singlemeans in the form of a lever. In the present construction, single oscillatably rotatable operating means is provided for actuating means to operate the patch shearing knife or ring, and separatemore positive means is provided to operate the press- K means and the perforating punch. This difference in the mode of actua- .tion has necessitated a material revision in the structural characteristics of the apparatus disclosed in the Hirszson patent noted hereinabove. It is, therefore, an objectof the invention to provide a novelly constructed shearing, pressing and punching mechanism embodying the novel features hereinabove noted.

Another object is to provide a novel cam assembly which, when actuated, operates upon associated parts in a predetermined sequence.

Another object is to provide, in an apparatus of the character described, a novel assembly of telescoped parts, each sequentially operable independently of one another.

With the foregoing and other objects in View, which will appear as the' description proceeds, the invention consists of certain novel features of construction, arrangement and combination of parts hereinafter fully described, illustratedin the accompanying drawings, and particularly pointed out in the appended claims, it being unin the formpro may be made Without departing from the spirit 2 or sacrificing any of the advantages of the in- Vention.

For the purpose of facilitating an understanding of my invention, I have illustrated in the accompanying drawings a preferred embodiment thereof, from an inspection of which, when considered in connection with the following description, my invention, its mode of construction, assembly and operation, and many of its advantages should be readily understood and appreciated.

Referring to the drawings in which the same characters of reference are employed to indicate corresponding or similar parts throughout the several figures of the drawings:

Fig. 1 is an elevational View of a simple form of reinforcing and punching apparatus embodying features of the present invention.

Fig. 2 is a vertical sectional View of the apparatus shown in Fig. 1, taken substantially on line 2-2 of Fig. 1.

Fig. 3 is a sectional view similar to Fig. 2, but showing parts of the apparatus in other positions occupied during operation thereof.

Fig. 4 is a sectional view similar to Fig. 2, showing the parts in still other positions assumed during operation.

Fig. 5 is a fragmentary View of a sheet, showing a patch of the kind provided by operation of the present apparatus attached thereto.

Before entering into a detail discussion of the structure and operation of the shearing, attaching and punching apparatus illustrated, it should be observed that the present disclosure is ccncerned with but a single patch forming and attaching mechanism, whereas, in actual practice, at least two and in some instances more of these mechanisms will be associated together, so as to provide a single sheet of paper with a plurality of reinforced punched holes. Inasmuch as the construction and operation of all of the mechanisms which may be joined in a single perforating and attaching machine embody the same structural characteristics, the present description will concern itself solely With the construction and operation of but one of the mechanisms.

Referring particularly to the Fig. 1 disclosure, each shearing, attaching and punching mechanism will be suitably mounted within a body Il, which may be cylindrical in shape and which is provided with a longitudinal bore or passageway l2 having an internal flange I3 adjacent to its lower end, so as to provide an internal shoulder I/i. The body Il may be supported in any suitable manner, so as to be held spaced from a die- 23 or other stop means may be forrnedlonfthe base i6 to limit insertion of the sheet ZZbeneath the foot plate i3.

A cylindrical shearing knife 2.4wis' mounted for free sliding movement within the passageway' l2'. The lower portion of the shearing knife 24 has its outside diameter reduced, as att25', and'isformedY at its lower end with a shearing edge 26. The

reduced diameter is of such size as to be guidedv through the opening defined by the internal flange i3 and to cooperate with' ashearing opening 2'! in the foot plate i3 when the shearing ring is moved downwardly a distancey sufficient to carry its shearing edge 25' into the shearing opening 21. A coil spring 23, arranged'in the space between theinside wall of the passageway I2' and the outside surface o the reduced diameter 25 of the shearing ring, has one end seated upon the shoulder Ifrandits other end bearing against a shoulder-29 lon the shearing ring 24. This spring normally holds the shearing ring in the elevated position illustrated in Fig. 2. A sleeve 3l is telescoped into the passageway i2, and its lower end rests against the-top edge ofthe shearing ring 24. This sleeve projects upwardly a short distance beyond the top end of the body H, and is-provided for a purpose to be described presently.

A perforating punch 32 is mounted to have free sliding movement within the sleeve 3l and shearing ring 24. As best illustrated in Fig. 2, the perforatingpunch includes a flange 33 which normally sits against-the bottom face-'of the sleeve 3i and isy of such diameter as to slide yfreely within the internal borel titi-inthe shearing ring 24. The flange 33 is located above the lowermost end of the perforating punch 32'; consequently, said punch extends downwardly to a planel above the plane of the shearing edge 26 of the shearing ring 2li: The uppermost'end of the perforating punch 32 extends beyond the upper end ofthe sleeve 3l and it carries adjacent its upper end a flange 35, against which one endv of a spring, 36' is adapted to bear; The spring 35` is arranged around the projectingend portion of the perforating punch 32, as shown, and its other or lower' end rests` against the top surface of the sleeve 3l. This spring 36' serves to maintain the perforating punch 32 in the position of elevation illustrated in Figs. Zand 3.

A cylindrical pressing shoe 3l is iitted around-k the lowermost end portion of the perforating punch within the bore 3d of the shearing ring 2d". The bottom face of saidv pressing shoe 31 normally is disposed below the bottom face-of the-'perforating punch 32. perforating punch 3E is provided with a fiat spot in which a pin dii carried by the pressing shoe 31 operates. A spring el is disposed within the shearing ring Et, withl its ends bearing against the perforating punch flange 33 and the pressingshoe 3l', respectively, so as to hold the pressing shoe normallyl in the position illustrated in Fig. 2.

Before entering into a discussion'of the various steps of operation effected upon manipulation of the apparatus, it should be observed that, the- For this purpose, the

body li is provided, preferably immediately above the foot plate i8, with a transverse passage 42 through which a strip 43 of pressure-sensitive adhesive tape is threaded. This strip of tape may be carried in the apparatus in the form of a roll, which is intermittently unwound during machine operation,` so as to advance the strip 431 through the body Il in a" step-by-step motion upon successive manipulation of the apparatus. The strip 43 is adapted to have portions thereof sheared therefrom, inamanner to be speciiically described presently, by the shearing ring-24 and the portion of the strip remaining and passing out of the-bodyp l I may-be suitably disposed of such as.

" for example, byrewinding the same on a spool much'in the'manner illustrated in the Hirszson patent hereinbetore referred to.

Operation of the shearing, pressing and perorating apparatus is accomplished in the present instance by means of cam elements mounted rmlyupon an oscillatably rotatable shaft 44. Obviously, the shaft M.' may'- ber journalledv in any approved .manner so as to permit oscillatable rotationthereof. upon manipulatien of a handle or lever carried thereby, but not presently illustrated.

Referring aga-in to the Fig. 2 disclosure wherein all of the `parts ofthe apparatus are in their normalor inoperative positions, a cam 45, carried-on the shaft Ml, has an edge portion thereof in' surface contactwith the top face of the sleeve 3i.' When the shafted 'is rotated in a clockwise direction', into substantially the position illustrated in'Fig.v 3, the cam 45 'has been effective to depress the sleeve 3l and, consequently, the shearing ring-2&1` downwardly; When this occurs, .theshearing edge 26 ofY the shearing ring 2d acts to shear out a circular patch lltifrom the strip-43T Downward movement of the shearing ring 24v compresses the spring 23 and it should be obvious that, should the applied force acting on the shaft liebe relieved, the spring 2t would returnv the parts to their normal positions. (Fig. 2.)

Continued rotation of-the shaft M in a clockwise-direction, followingv the shearing of a patch 46" from the strip 43, carries the cam d5 into substantially the position illustrated in Fig. 4. Upon referring' tothat'ii'gure, it wllbe observed that an auxiliary cam elementl t1, whichis secured firmly in a' predetermined position on one face of the cam `45; becomesV effective to lower the perforating punch 32 from the elevated position illustrated in Fig. 3, into the depressed position illustrated in Fig. 4. When this occurs, the spring 36, which normally holds the perforating punch 32elevated, is compressed, as well as the spring 4I associated with th-e pressing shoe 3l'.

The pressing shoe 3i' has, of course, advanced `in unison with the perforating punch 32 during initial downwardh movement of the periorating punch. This-common advanceof the two elements continues until-the pressing shoe 31 encounters'the sheared patch i6 and carries it downwardly into tight pressing face to face engagement with the sheet 22. At that time further downward movement of the pressing shoe 31 is arrested and the continued advance downwardly ofthe perforating punch 32 causes its perforatingend to pass through the patch and sheet'to thereby perforate the same. The appliedforce on the shaft-44 may then be relieved, whereupon the parts willreturn to the initial po- Sitions illustrated in Fig. 2. t is to be under- 75stood,- of course; that manual or mechanical means (not shown) has been actuated to advance the strip 43 a suiicient distance through the transverse passage 42 to locate an unperforated area beneath the shearing ring 24, so that a second shearing, attaching and punching operation may be eiected when the apparatus is again actuated.

Although a specic form of cam structure has been selected as the most feasible for operation of the apparatus illustrated, it should be understood that other cam means than that illustrated may be associated with the apparatus to eiTect the same or substantially the same sequence of operation, and that other modiications may be made in the details of construction of Various parts of the apparatus without departing from the spirit of the invention or the scope of the appended claims.

Having explained the essential principles of the device, I claim:

1. In a device for severing and attaching a reinforcing piece to a sheet and perforating the attached piece and sheet, .a body having a passageway therethrough, an internal shoulder at the lower end of said body, a shearing ring telescoped in the passageway, a spring cooperating with the shoulder to normally hold the shearing shearing ring, a perforating through the sleeve and pressmeans arranged between the normally hold end above the sleeve surrounding a 6 bottom plane of the shearing ring, a spring surrounding `a portion of the perforating punch acting on one end of the pressing ring to maintain its other end below the plane of the bottom of the perforating punch, and cam means actuable to initially urge the shearmg ring downwardly,

2. In a device for severing and attaching a reinforcing patch to a sheet and perforating the attached piece and sheet, a vertically disposed cylindrical body, a shearing ring in the body, yieldable means normally holdingthe shearing ring in an elevated position, a perforating punch, a portion of the punch seated on the shearing ring, means between the sleeve and punch normally holding the punch elevated, a pressing ring telescoped on and resiliently connected to the punch within the shearing ring, means to urge the shearing ring downwardly to shear a patch from a supply strip of adhesive coated material, and separate means to carry the pressing ring downwardly to attach the patch onto a sheet located therebeneath and to then carry the punch downwardly to perforate the patch and sheet.

UNITED STATES PATENTS Name Date Hirszson Jan. 29, 1952 Number 

